Based on Earl Babbie's best-selling text, THE PRACTICE OF SOCIAL RESEARCH, this text combines the key strengths of Babbie's text (accessibility; a conversational, "friendly" writing style; and great examples) with Michael G. Maxfield's expertise in criminology and criminal justice for a text that addresses the specific methods used in criminal justice research. The new edition of this market-leader includes changes in its coverage of ethics, causation, validity, and research design, as well as updated coverage and statistics, and expanded examples, especially in the discussion of field research. A running case study on the dropping crime rate in New York City-a study to which co-author Maxfield has close links-further demonstrates the important role of research methods in our evolving understanding of crime and society.